.glass-container {   
	/*此处背景图自行替换*/  
	   
	min-height: 80vh;   
	box-sizing: border-box;   
	margin: 0;   
	padding-top: calc(20vh - 2em) ; 
	padding-bottom: calc(20vh - 2em) ; 
	font: 150%/1.6 Baskerville, Palatino, serif;   
}   
  
/**  
 * 整体居中功能；  
 * 背景透明虚化  
 * 溢出隐藏  
 * 边缘圆角化  
 * 文字增加淡阴影  
 */  
.glass-container .description{   
	position: relative;   
	margin: 0 auto;   
	padding: 1em;   
	max-width: 23em;  
	background: url(../img/demo.png) no-repeat center center fixed;   
	background-size: cover;
	  
	overflow: hidden;   
	border-radius: .3em;   
	box-shadow: 0 0 0 1px hsla(0,0%,100%,.3) inset,   
				0 .5em 1em rgba(0, 0, 0, 0.6);   
	text-shadow: 0 1px 1px hsla(0,0%,100%,.3);   
}   
  
/*使用滤镜模糊边缘*/  
.glass-container .description::before{   
	content: '';   
	position: absolute;   
	top: 0; rightright: 0; bottombottom: 0; left: 0;   
	margin: -30px;   
	z-index: -1;   
	-webkit-filter: blur(20px);   
	filter: blur(20px);   
}   